C11111333133313232233133313331333133112111112113313331312111113231333132223221   >>    C1111133313331323223313331333133313311211111211331333131211111323133313222322   <<    C11111333133313232233133313331333133112111112113313331312111113231333132223223   >>      C11111333133313232233133313331333133112111112113313331312111113231333132223222   >>